What do SU and ATS mean?

Bookie:Dear Tim,SU is the abbreviation for Straight Up, meaning the record of a team overall, without factoring in the spread. Conversely, ATS is Against the Spread, meaning the record of a team in relation to the spread. In other words, this one refers ONLY to spread numbers and not to a team's record in the standings. Sincerely, Bookie's AssistantAskTheBookie@BetUS.com.